I have searched around before and couldn't really find a clean cut answer about this subject, what I want in simple terms is this:
Drag and drop feature gives me a directory with the filename.
C:\Users\chaos\Desktop\Game Launcher V1.0.exe
I need to make this one string into two different strings so it would do this
Directory: C:\Users\chaos\Desktop\
FileName: Game Launcher V1.0.exe
I figured there was foruma for a loop to do this, so I was wondering what your input on this situation would be, I'd love to hear it. Thanks :)
I am on Windows using Visual Studio 2015. (UTF16)
Since you are on Windows, have a look at the PathRemoveFileSpec(), PathStripPath(), and PathFindFileName() functions, eg:
LPTSTR szFullFilename = ...; // value from drag&drop
int iLength = lstrlen(szFullFilename);
LPTSTR szDirectory = new TCHAR[iLength+1];
lstrcpy(szDirectory, szFullFilename);
PathRemoveFileSpec(szDirectory);
LPTSTR szFileName = new TCHAR[iLength+1];
lstrcpy(szFileName, szFullFilename);
PathStripPath(szFileName);
// use szDirectory and szFileName as needed...
delete[] szDirectory;
delete[] szFileName;
LPTSTR szFullFilename = ...; // value from drag&drop
int iLength = lstrlen(szFullFilename);
LPTSTR szDirectory = new TCHAR[iLength];
lstrcpy(szDirectory, szFullFilename);
LPTSTR szFileName = PathFindFileName(szDirectory);
if (szFileName != szDirectory)
*(szFileName-1) = 0;
// use szDirectory and szFileName as needed...
delete[] szDirectory;
Related
I have folder of different documents like: pdf, txt, rtf, images.
My case is to send all documents to the printer (print it). Used framework is MFC and WinAPI. Current implementation has dialog box for choose documents and another dialog for choose printer.
Then question appears, how to print it all? Do I need to convert every documents to PDF, then merge it and print one pdf document? I will appreciate any advice in that field.
void CMultipleDocsPrintTestDlg::OnBnClickedButton1()
{
TCHAR strFilter[] = { _T("Rule Profile (*.pdf)||") };
// Create buffer for file names.
const DWORD numberOfFileNames = 100;
const DWORD fileNameMaxLength = MAX_PATH + 1;
const DWORD bufferSize = (numberOfFileNames * fileNameMaxLength) + 1;
CFileDialog fileDlg(TRUE, _T("pdf"), NULL, OFN_ALLOWMULTISELECT, strFilter);
TCHAR* filenamesBuffer = new TCHAR[bufferSize];
// Initialize beginning and end of buffer.
filenamesBuffer[0] = NULL;
filenamesBuffer[bufferSize - 1] = NULL;
// Attach buffer to OPENFILENAME member.
fileDlg.GetOFN().lpstrFile = filenamesBuffer;
fileDlg.GetOFN().nMaxFile = bufferSize;
// Create array for file names.
CString fileNameArray[numberOfFileNames];
if (fileDlg.DoModal() == IDOK)
{
// Retrieve file name(s).
POSITION fileNamesPosition = fileDlg.GetStartPosition();
int iCtr = 0;
while (fileNamesPosition != NULL)
{
fileNameArray[iCtr++] = fileDlg.GetNextPathName(fileNamesPosition);
}
}
// Release file names buffer.
delete[] filenamesBuffer;
CPrintDialog dlg(FALSE);
dlg.m_pd.Flags |= PD_PRINTSETUP;
CString printerName;
if (dlg.DoModal() == IDOK)
{
printerName = dlg.GetDeviceName();
}
// What next ???
}
You could make use of ShellExecute to do this. The parameter lpOperation can be set to print. To quote:
Prints the file specified by lpFile. If lpFile is not a document file, the function fails.
As mentioned in a similar discussion here on StackOverflow (ShellExecute, "Print") you should keep in mind:
You need to make sure that the machine's associations are configured to handle the print verb.
You referred to pdf, txt, rtf, images which should all be supported I would think by this mechanism.
ShellExecute(NULL, "print", fileNameArray[0], nullptr, nullptr, SW_SHOWNORMAL);
The last parameter might have to be changed (SW_SHOWNORMAL). This code would be put in a loop so you could call it for each file. And note that the above code snippet has not been tested.
I am trying to get the text of the currently chosen tab in CTabCtrl.
int tabCurSel = currentTabCtrl->GetCurSel();
TCITEM tcItem;
tcItem.mask = TCIF_TEXT;
tcItem.cchTextMax = 256; //Do I need this?
CString tabCurrentCString;
currentTabCtrl->GetItem(tabCurSel, &tcItem);
tabCurrentCString = tcItem.pszText;
CT2A tabCurrentChar(tabCurrentCString);
std::string tabCurrentStr(tabCurrentChar);
return tabCurrentStr;
I clearly have some unnecessary string conversions and currently this returns a "Error reading characters of the string" in
tcItem.pszText;
How can I get the string from the CTabCtrl? I ultimately am trying to get an std::string but the main question is how to get the text from the tab.
tcItem.pszText is pointing to 0. To fill it with text, it has to point to a buffer before a call is made to GetItem:
Documentation for: CTabCtrl::GetItem
pszText
Pointer to a null-terminated string containing the tab text if the
structure contains information about a tab. If the structure is
receiving information, this member specifies the address of the buffer
that receives the tab text.
Example:
TCITEM tcItem { 0 };
tcItem.mask = TCIF_TEXT;
const int len = 256;
tcItem.cchTextMax = len;
TCHAR buf[len] = { 0 };
tcItem.pszText = buf;
currentTabCtrl->GetItem(tabCurSel, &tcItem);
Both tcItem.pszText and buf will point to the same text. Or use CString with CString::GetBuffer()/CString::ReleaseBuffer()
CString tabCurrentCString;
TCITEM tcItem;
tcItem.mask = TCIF_TEXT;
tcItem.cchTextMax = 256;
tcItem.pszText = tabCurrentCString.GetBuffer(tcItem.cchTextMax);
BOOL result = currentTabCtrl->GetItem(tabCurSel, &tcItem);
tabCurrentCString.ReleaseBuffer();
if (result)
MessageBox(tabCurrentCString); //success
It looks like you are using the recommended Unicode settings. Avoid converting UNICODE to ANSI (std::string). This conversion will work for Latin languages, most of the time, but it's not needed. You can use std::wstring if you need to use that in STL, or convert to UTF-8 if you want to send data to internet etc.
std::string str = CW2A(tabCurrentCString, CP_UTF8);
We have some data in a text file which is built into our executable as a custom resource to be read at runtime. The size of this text file is over 7 million characters.
I can successfully search for and locate strings within the resource which appear near the top of the text file, but when attempting to search for terms a few million characters down, strstr returns NULL indicating that the string cannot be found. Is there a limit to the length of a string literal that can be stored in a char* or the amount of data that can be stored in an embedded resource? Code is shown below
char* data = NULL;
HINSTANCE hInst = NULL;
HRSRC hRes = FindResource(hInst, MAKEINTRESOURCE(IDR_TEXT_FILE1), "TESTRESOURCE");
if(NULL != hRes)
{
HGLOBAL hData = LoadResource(hInst, hRes);
if (hData)
{
DWORD dataSize = SizeofResource(hInst, hRes);
data = (char*)LockResource(hData);
}
else
break;
char* pkcSearchResult = strstr(data, "NumListDetails");
if ( pkcSearchResult != NULL )
{
// parse data
}
}
Thanks.
The problem might be the method you use for searching. strstr uses ANSI strings, and will terminate when it encounters a '\0' in the search domain.
You might use something like memstr (one of many implementations can be found here).
Do you get any output from GetLastError(), specifically after calling SizeofResource.
You can also check that dataSize > 0 to ensure an error hasn't occurred.
DWORD dataSize = SizeofResource(hInst, hRes);
if(dataSize > 0)
{
data = (char*)LockResource(hData);
}
else
{
//check error codes
}
MSDN Docs
The problem was null characters in the data which prematurely ended the char* variable. To get around this I just had to read the data into a void pointer then copy it into a dynamically created array.
DWORD dataSize = SizeofResource(hInst, hRes);
void* pvData = LockResource(hData);
char* pcData = new char[dataSize];
memcpy_s(pcData,strlen(pcData),pvData,dataSize);
I am a newbie to C++. I want to get the content of the clipboard, which might contain Unicode chars, append a div tag with some content formatted in HTML and set that back to clipboard.
I have achieved successfully in getting the content and appending it. But could not set it back to the clipboard as an HTML text. I have achieved setting as simple text. Here is my code:
#include <shlwapi.h>
#include <iostream>
#include <conio.h>
#include <stdio.h>
using namespace std;
wstring getClipboard(){
if (OpenClipboard(NULL)){
HANDLE clip = GetClipboardData(CF_UNICODETEXT);
WCHAR * c;
c = (WCHAR *)clip;
CloseClipboard();
return (WCHAR *)clip;
}
return L"";
}
bool setClipboard(wstring textToclipboard)
{
if (OpenClipboard(NULL)){
EmptyClipboard();
HGLOBAL hClipboardData;
size_t size = (textToclipboard.length()+1) * sizeof(WCHAR);
hClipboardData = GlobalAlloc(NULL, size);
WCHAR* pchData = (WCHAR*)GlobalLock(hClipboardData);
memcpy(pchData, textToclipboard.c_str(), size);
SetClipboardData(CF_UNICODETEXT, hClipboardData);
GlobalUnlock(hClipboardData);
CloseClipboard();
return true;
}
return false;
}
int main (int argc, char * argv[])
{
wstring s = getClipboard();
s += std::wstring(L"some extra text <b>hello</b>");
setClipboard(s);
getch();
return 0;
}
I did try using the code described here and read the doc here. But I couldn't make it work. What I tried could be way off track or completely wrong.
Update: The code below is what I tried after the modifications suggested by Cody Gray to the original code presented here:
bool CopyHTML2(WCHAR *html ){
wchar_t *buf = new wchar_t [400 + wcslen(html)];
if(!buf) return false;
static int cfid = 0;
if(!cfid) cfid = RegisterClipboardFormat("HTML Format");
// Create a template string for the HTML header...
wcscpy(buf,
L"Version:0.9\r\n"
L"StartHTML:00000000\r\n"
L"EndHTML:00000000\r\n"
L"StartFragment:00000000\r\n"
L"EndFragment:00000000\r\n"
L"<html><body>\r\n"
L"<!--StartFragment -->\r\n");
// Append the HTML...
wcscat(buf, html);
wcscat(buf, L"\r\n");
// Finish up the HTML format...
wcscat(buf,
L"<!--EndFragment-->\r\n"
L"</body>\r\n"
L"</html>");
wchar_t *ptr = wcsstr(buf, L"StartHTML");
wsprintfW(ptr+10, L"%08u", wcsstr(buf, L"<html>") - buf);
*(ptr+10+8) = L'\r';
ptr = wcsstr(buf, L"EndHTML");
wsprintfW(ptr+8, L"%08u", wcslen(buf));
*(ptr+8+8) = '\r';
ptr = wcsstr(buf, L"StartFragment");
wsprintfW(ptr+14, L"%08u", wcsstr(buf, L"<!--StartFrag") - buf);
*(ptr+14+8) = '\r';
ptr = wcsstr(buf, L"EndFragment");
wsprintfW(ptr+12, L"%08u", wcsstr(buf, L"<!--EndFrag") - buf);
*(ptr+12+8) = '\r';
// Open the clipboard...
if(OpenClipboard(0)) {
EmptyClipboard();
HGLOBAL hText = GlobalAlloc(GMEM_MOVEABLE |GMEM_DDESHARE, wcslen(buf)+4);
wchar_t *ptr = (wchar_t *)GlobalLock(hText);
wcscpy(ptr, buf);
GlobalUnlock(hText);
SetClipboardData(cfid, hText);
CloseClipboard();
GlobalFree(hText);
}
// Clean up...
delete [] buf;
return true;
}
This code compiles successfully, But I get the following error at SetClipboardData : HEAP[Project1.exe]: Heap block at 007A8530 modified at 007A860A past requested size of d2
Project1.exe has triggered a breakpoint.
Please guide me on how to proceed. I am using Visual Studio Express 2012 on Windows 8. Thanks.
You're mismatching ANSI (narrow) and Unicode (wide) strings.
Unlike the wcscpy function, the w in the wsprintf function doesn't stand for "wide", it stands for "Windows". It is part of the Win32 API, rather than the C runtime library. All of the Win32 API functions that work with strings have two versions, one suffixed with an A that deals with ANSI strings and another suffixed with a W that deals with wide strings. The headers hide all of this from you with macros. I explain all of this in more detail here—recommended reading.
Anyway, the simple fix here is to explicitly call the wide variant of that function, since you're correctly using wide strings everywhere else. Make all the calls to wsprintf look like this:
wchar_t *ptr = wcsstr(buf, L"StartHTML");
wsprintfW(ptr+10, L"%08u", wcsstr(buf, L"<html>") - buf);
*(ptr+10+8) = L'\r';
Alternatively, you could use the swprintf function provided by the C runtime library instead of the Win32 version. This one works just like the wcsstr and wcscpy functions you're using elsewhere. The w in the name means "wide". The documentation for this series of functions is here.
Note also that when you use character or string literals, they also need to be wide characters. You accomplish that by prepending them with an L. You do that some places, but miss doing it others. Make sure that you do it consistently.
The compiler should warn you about all this, though. You just need to make sure you turn your warning level up and don't ignore any of the warnings. Also make sure that both the UNICODE and _UNICODE preprocessor symbols are defined globally for your project. That will ensure that you are always calling the Unicode/wide versions of functions. Although that should be the default for all new projects.
This is the function I came up with the help of Jochen Arndt at codeproject.com. Hope this helps somebody. Here is a complete working code, if you are interested in checking this out.
It still has one problem. That is when pasted to onenote alone, it pastes gibberish after a anchor tag. It does not happen with Word, PowerPoint or Excel. And it does not have this problem for normal English language texts. If you have a solution for this, please do let me know. The problem seems to be with OneNote. Not with the code.
bool setClipboard(LPCWSTR lpszWide){
int nUtf8Size = ::WideCharToMultiByte(CP_UTF8, 0, lpszWide, -1, NULL, 0, NULL, NULL);
if (nUtf8Size < 1) return false;
const int nDescLen = 105;
HGLOBAL hGlobal = ::GlobalAlloc(GMEM_MOVEABLE, nDescLen + nUtf8Size);
if (NULL != hGlobal)
{
bool bErr = false;
LPSTR lpszBuf = static_cast<LPSTR>(::GlobalLock(hGlobal));
LPSTR lpszUtf8 = lpszBuf + nDescLen;
if (::WideCharToMultiByte(CP_UTF8, 0, lpszWide, -1, lpszUtf8, nUtf8Size, NULL, NULL) <= 0)
{
bErr = true;
}
else
{
LPCSTR lpszStartFrag = strstr(lpszUtf8, "<!--StartFragment-->");
LPCSTR lpszEndFrag = strstr(lpszUtf8, "<!--EndFragment-->");
lpszStartFrag += strlen("<!--StartFragment-->") + 2;
int i = _snprintf(
lpszBuf, nDescLen,
"Version:1.0\r\nStartHTML:%010d\r\nEndHTML:%010d\r\nStartFragment:%010d\r\nEndFragment:%010d\r\n",
nDescLen,
nDescLen + nUtf8Size - 1, // offset to next char behind string
nDescLen + static_cast<int>(lpszStartFrag - lpszUtf8),
nDescLen + static_cast<int>(lpszEndFrag - lpszUtf8));
}
::GlobalUnlock(hGlobal);
if (bErr)
{
::GlobalFree(hGlobal);
hGlobal = NULL;
}
// Get clipboard id for HTML format...
static int cfid = 0;
cfid = RegisterClipboardFormat("HTML Format");
// Open the clipboard...
if(OpenClipboard(0)) {
EmptyClipboard();
HGLOBAL hText = GlobalAlloc(GMEM_MOVEABLE |GMEM_DDESHARE, strlen(lpszBuf)+4);
char *ptr = (char *)GlobalLock(hText);
strcpy(ptr, lpszBuf);
GlobalUnlock(hText);
::SetClipboardData(cfid, hText);
CloseClipboard();
GlobalFree(hText);
}
}
return NULL != hGlobal;
}
Your problem comes from the use of wchar_t instead of char in the cited example which makes you wrong on the offset computations.
I would however recommend you avoiding the use of wchar_t for transfering UNICODE text to the clipboard. Indeed, UTF-8 char could coded with a sequence of bytes comprised between 1 and 4 bytes, while wchar_t on Windows is a fixed 2 bytes type.
As explained in the Microsoft doc refered in your email, the content of the clipboard shall be UNICODE, which happens to be the same as ASCII for the characters contained in the header of the clipboard memory.
To transfert UNICODE in the clipboard, you can do it using the standard char C++ functions to prepare the content sent to clipboard (std::string for eg.)
While the cited example works, please find here another code sample using C++ framework that can actually copy UTF-8 chars to the clipboard in HTML format:
void copyHTMLtoClipboard(const std::string& html) {
std::string contextStart("Version:0.9\r\nStartHTML:0000000000\r\nEndHTML:0000000000\r\nStartFragment:0000000000\r\nEndFragment:0000000000\r\n<html><body>\r\n<!--StartFragment -->\r\n");
std::string contextEnd("\r\n<!--EndFragment -->\r\n</body></html>");
std::stringstream aux;
aux << contextStart << html << contextEnd;
std::string res = aux.str();
size_t htmlStart = 105 * sizeof(char);
size_t fragmentStart = 119 * sizeof(char);
size_t htmlEnd = res.size() * sizeof(char);
size_t fragmentEnd = htmlEnd - 35 * sizeof(char);
aux.fill('0');
aux.width(10);
aux.seekp(23);
aux << htmlStart;
aux.seekp(43);
aux.fill('0');
aux.width(10);
aux << htmlEnd;
aux.seekp(69);
aux.fill('0');
aux.width(10);
aux << fragmentStart;
aux.seekp(93);
aux.fill('0');
aux.width(10);
aux << fragmentEnd;
res = aux.str();
HGLOBAL hdst = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE, htmlEnd + sizeof(char));
LPSTR dst = (LPSTR)GlobalLock(hdst);
memcpy(dst, res.c_str(), htmlEnd);
dst[htmlEnd] = 0;
GlobalUnlock(hdst);
OpenClipboard(NULL);
EmptyClipboard();
SetClipboardData(RegisterClipboardFormat(L"HTML Format"), hdst);
CloseClipboard();
GlobalFree(hdst);
}
Note that this code was compiled defining the macros _UNICODE and UNICODE.
I'm trying to implement some WIA 2.0 code in my VS2012 C++ library and have run into a problem with the IWiaDevMgr2::GetImageDlg call, specifically the ppbstrFilePaths paraneter. I'm not quite sure how to declare/initialize it.
From the documentation at http://msdn.microsoft.com/en-us/library/windows/desktop/aa359932(v=vs.85).aspx:
ppbstrFilePaths [in] TYPE - BSTR**
The address of a pointer to an array of paths for the scanned files. Initialize the pointer to point to an array of size zero (0) before IWiaDevMgr2::GetImageDlg is called. See Remarks.
I've tried all sorts of variations on declaring this with no success, for example:
// No scanner selection dialog, hr = E_OUTOFMEMORY
BSTR *files = new BSTR[0];
HRESULT hr = _pWiaDevMgr->GetImageDlg(0, NULL, *_parentHwnd, path, fileTemplate, numFiles, &files, &_pWiaItemRoot);
I've also tried things similar to this:
// No scanner selection dialog, hr = E_OUTOFMEMORY
BSTR **files = (BSTR**)CoTaskMemAlloc(0);
*files = new BSTR[0];
HRESULT hr = _pWiaDevMgr->GetImageDlg(0, NULL, *_parentHwnd, path, fileTemplate, &numFiles, files, &_pWiaItemRoot);
Can anyone point me in the right direction for declaring and initializing this BSTR**? I'm not a big C++ dev and pretty much guessing at this point.
Turns out I was on the right track with my first try:
CComBSTR path("D:\\TestWiaScan");
CComBSTR fileTemplate("FileName");
LONG numFiles = 0L;
BSTR *files = new BSTR[0];
HRESULT hr1 = _pWiaDevMgr->GetImageDlg(0, NULL, _parentHwnd, path, fileTemplate, &numFiles, &files, &_pWiaItemRoot);
if (files)
{
for(int i=0;i < numFiles;i++)
{
SysFreeString(files[i]);
}
}
CoTaskMemFree(files);
if (_pWiaItemRoot)
{
_pWiaItemRoot->Release();
_pWiaItemRoot = NULL;
}
The reason my first try wasn't working was because of issues with the BSTR parameters I was passing in. Using CComBSTR or SysAllocString resolved that.